CVE-2025-63675 cryptidy allows code execution via untrusted data due to pickle.loads
Attackers can execute arbitrary code by providing malicious serialized data to the cryptidy library's decryption function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-63675?
CVE-2025-63675 is a medium-severity unsafe deserialization vulnerability in cryptidy, published on 31 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
cryptidy through 1.2.4 allows code execution via untrusted data because pickle.loads is used. This occurs in aes_decrypt_message in symmetric_encryption.py.
Weakness: CWE-502
Which versions are affected by CVE-2025-63675?
3 open source packages ship an affected version, including cryptidy. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
cryptidy PyPI | All versions to 1.2.4 | None |
cryptidy PyPI | All versions to 1.2.4 | None |
cryptidy PyPI | All versions to 1.2.4 | None |
Products include Netinvent Cryptidy.
How do I fix CVE-2025-63675?
No fix has been published for CVE-2025-63675 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-63675 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63675 exists.
Sources
Also known as GHSA-97w9-v595-3h5q, PYSEC-2026-1282.